SPT-100 subsystem development status and plan

Day, Maxine; Maslennikov, N.; Rogers, William C.

doi:10.2514/6.1994-2853

Cited by 5 publications

(1 citation statement)

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“…In the indirect flow control method, the fixed structure throttling micro flow control method regulates the flow by adjusting the aperture and pressure that affect the flow. The metal capillary, the throttle orifice and the metal cellular materials are usually used as the throttling structure [4][5][6][7], which has the advantages of simple structure and low development difficulty, but needs to carry out ground calibration in advance and take the calibration value as the basis for the flow regulation of space electric propulsion system, the response speed of flow regulation is slow and the accuracy is low. Another indirect flow control method uses the exciting current to deform the giant magnetostrictive material to realize flow regulation [8].…”

Section: Introductionmentioning

confidence: 99%

Research on Closed-Loop Control and Flow Noise for Piezoelectric Type Micro Flow Controller for Electric Propulsion

Zhang¹,

Wang²,

Fu³

et al. 2022

Proceedings of the International Conference of Fluid Power and Mechatronic Control Engineering (ICFPMCE 2022)

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For the control problem of micro-flow controller using piezoelectric ceramics as driving components in the electric propulsion system, we directly utilize the collected rate of flow as the state and give a closed-loop control method which can eliminate the hysteresis and creep characteristics of piezoelectric ceramic. Through the experiment with the real flow control system, it is verified that the control method can effectively stabilize and follow the rate of flow, and the influence of ambient temperature on the closed-loop flow control is analysed. Then by analysing the power spectral density analysis of the obtained flow data, the flow noise is significant in the low frequency band for different closed-loop target flows, while in order to reduce the flow noise, the flow sampling frequency should be increased.

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Section: Introductionmentioning

confidence: 99%